Journal of Materials Research and Technology-JMR&T
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2023
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IF 6.4
Sijie Liu,Renda Wang,Li Wang,Fangfang Ge,Mengyu Gao,Yang Si,Bingsheng Li
In this work, static immersion and gravimetric methods were used to study the corrosion behavior of three common stainless steels and four Ni-based alloys in a NaCl–MgCl 2 –KCl mixed molten salt under vacuum atmosphere. The corrosion test was conducted at 700 °C, with a maximum exposure time of 100 h. Corrosion behavior was determined by measuring the mass loss of the sample at different time intervals and the corrosion rates at 100 h. The microstructure of the alloy was analyzed by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), atomic force microscope (AFM), and X-ray diffraction (XRD). The results showed that stainless steels were generally more severely corroded than Ni-based alloys. 304 stainless steel and In800H exhibited the worst corrosion resistance, whereas Ni-based alloy In625 had the best corrosion resistance. Fe and Cr were dissolved in the molten chloride salts and reacted with the molten chloride salts. Mo played a positive role in suppressing the corrosion of the alloys in molten chloride salts by inhibiting the outward diffusion of the elements.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
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2024
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IF 6
Danyang Liang,Lin Luo,Haiyu Luo,Qing Liu,Khamiddolov Temirlan,Wenhao Li,Wenjie Yan
This study modified lentil starch stored in a vacuum and regular (Ziplock-packed) conditions using electron beam irradiation and X-rays. The effects of these irradiations and environments on starch modification were evaluated by comparing changes in physicochemical and functional properties. Both electron beam and X-ray irradiation significantly reduced the short-range order and molecular weight of the starch while increasing the content of short chains. Under a vacuum environment, all irradiations exhibited more substantial degradation effects than regular conditions. Electron beam irradiation significantly reduced the relative crystallinity and the content of long chains, whereas X-rays had a more pronounced impact on disrupting the crystal structure of lentil starch. The vacuum environment enhanced the effectiveness of irradiation in improving the antidigestive properties of starch, leading to an increase in resistant starch content from 75.75% to 79.22%. This study offers new insights into producing modified starches using irradiation in combination with specific treatment environments.
研究领域:
食品科学
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分子生物学
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DOI
高影响因子
ENVIRONMENTAL POLLUTION
·
2023
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IF 8.9
Tengteng Shi,Baoqiang Xu,Jilin He,Xinyang Liu,Zibin Zuo
The efficient release of arsenic in copper smelting flue dust (CSFD) with complicated production conditions and composition under the premise of environmental safety is difficult for the copper smelting industry. The vacuum environment is conducive to the volatilization of low-boiling arsenic compounds , which is beneficial to the physical process and chemical reaction of increasing the volume. In the present study, combined with thermodynamic calculations, the roasting process of pyrite and CSFD mixed in proportion in vacuum was simulated. Additionally, the release process of arsenic and the interaction mechanism of the main phases were performed in detail. The addition of pyrite facilitated the decomposition of stable arsenate in CSFD into volatile arsenic oxides. The results indicated that exceeding 98% of arsenic in CSFD volatilized into the condenser, while the arsenic content in the residue was reduced to 0.32% under optimal conditions. Pyrite could reduce the oxygen potential during the chemical reaction with CSFD, reacting with sulfates in CSFD to convert into sulfides and magnetic iron oxide (Fe 3 O 4 ) simultaneously, and Bi 2 O 3 would be transformed into metallic Bi. These findings are significant for developing arsenic-containing hazardous waste treatment routes and the application of innovative technical approaches.
研究领域:
冶金工程
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环境科学
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DOI
PubMed
高影响因子
DESALINATION
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2023
·
IF 9.9
Weiming Sun,Zhongbao Liu,Yimo Liu,Zepeng Wang
Solar-driven interfacial evaporation technology has immense potential in addressing the global challenge of freshwater scarcity. Currently, most solar interface evaporators have complex and costly manufacturing processes, hindering practical applications. Additionally, in many solar distillation systems, the evaporation and condensation processes occur within the same space. This causes sunlight to be scattered or absorbed by the water droplets on the transparent surface, thereby reducing the solar energy reaching the evaporator, the high internal humidity ratio further hinders water evaporation . Therefore, we developed a cost-effective polyvinyl alcohol/carbon black hydrogel (PCH) with a simple fabrication process. PCH achieves an evaporation rate of 1.54 kg m −2 h −1 and an energy conversion efficiency as high as 90.5 % under 1 sun (1 kW m −2 ). Furthermore, we have introduced a novel solar-driven low-vacuum interfacial distillation system (SLIDS) that separates the evaporation and condensation processes into distinct spaces and employs the principle of low pressure to enhance water evaporation. The condensate yield rate of the SLIDS was 1.46 kg m −2 h −1 , which is 2.2 times higher than traditional system under 1 sun. This increase in the condensate yield rate by 41.6 % was achieved through the introduction of low-pressure conditions.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2022
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IF 4.865
Shiyu Cui,Zhou Yi,Yi Xu,Jun Huang,Jilin Xu,Junming Luo,Qiong Jiang,Jiayi Peng,Xiaoma Tao
Molybdenum disilicide (MoSi 2 ) is a novel crack-healing material used in the traditional thermal barrier coating , which reacts with ZrO 2 to attain a corresponding volume expansion of approximately 138%. However, the pre-oxidation of MoSi 2 causes the “pesting” phenomenon, which degrades the microstructure and mechanical properties throughout the service. To address this issue, the aluminum oxide was fabricated on the MoSi 2 surface using the sol-gel method and low-pressure post-heat treatment to prevent oxygen penetration. The orthogonal experiment investigated the effect of pH, temperature, and water amount on sol generation. Because the Zeta potential difference has reached its maximum value (about 27 mV) at pH 4, the aluminum sol was notably adsorbed on the MoSi 2 particles. The modified MoSi 2 @Al 2 O 3 particles were characterized to understand their morphologies, surface adsorption energy, and crystal structures. The oxygen adsorption energy on the MoSi 2 (103) surface was lower than that on the Mo 5 Si 3 (411) surface, which indicated that the oxidization process can be divided into two independent steps. The Al 2 O 3 shell was uniformly formed on the MoSi 2 particles, especially in the low-vacuum environment (10 MPa) for 3 h post-treatment. The dense core-shell structure can prevent oxygen penetration into the MoSi 2 surface, thus prolonging the self-healing property of MoSi 2 .
研究领域:
材料科学
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表面工程
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涂层技术
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DOI
高影响因子
Nature Communications
·
2023
·Vol. 14
·期 1
·1-12
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IF 16.6
Zhu Guo-Rui,Zhang Qin,Liu Qing-Song,Bai Qi-Yao,Quan Yi-Zhou,Gao You,Wu Gang,Wang Yu-Zhong
As a replacement for highly flammable and volatile organic liquid electrolyte, solid polymer electrolyte shows attractive practical prospect in high-energy lithium metal batteries. However, unsatisfied interface performance and ionic conductivities are two critical challenges. A common strategy involves introducing organic solvents or plasticizers, but this violates the original intention of security design. Here, an electrolyte concept called liquid polymer electrolyte without any small molecular solvents is proposed for safe and high-performance batteries, based on the design of a room-temperature liquid-state brush-like polymer as the sole solvent of lithium salts. This liquid polymer electrolyte is non-flammable and exhibits high ionic conductivity (1.09 \(\times\) 10 −4 S cm −1 at 25 °C), significant lithium dendrite suppression, and stable long-term cycling over a wide operating temperature range ( ≥ 1000 cycles at 60 °C and 90 °C). Moreover, the pouch cell can resist thermal abuse, vacuum environment, and mechanical abuse. This electrolyte and design strategy are expected to provide enlightening ideas for the development of safe and high-performance polymer electrolytes.
研究领域:
材料科学
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电化学
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能源存储
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）